Monkey-wrench



(ModeL) G. T. FINAGIN.

MONKEY WRENGH.

No. 247,328. Patented Sept. 20,1881.

WITNE S: i

TDRNEYS UNITED STATES PATENT QFFICE.

GEORGE T. FINAGIN, OF PIOOHE, NEVADA,"

MONKEY-WRENCH.

SPECIFICATION forming part of Letters Patent No. 247,328, dated September 20, 1881. Application filed May 9, 1881. (ModeL) To all whom it may concern:

Be it known that I, GEORGE T. FINAGIN, of Pioche, in the county of Lincoln and State of Nevada, have invented a new and Improved Monkey-Wrench, of which the following is a full, clear, and exact description.

The object of myinvention is the production of a monkey-wrench of simplified construction and one the jaws of which can be set to engage with nuts 01" larger size than those ofthe same length of handle now in use, and one in which the movable jaw is firmly held while grasping the nut, and the handle thereof braced and stifl'ened and held against dangerofspringing while under strain.

in the accompanying drawings, Figure 1 is a side elevation of my invention with one side ofihe sliding yoke removed. Fig. 2 is a front elevation of the same, and Fig. 3 is a cross section taken on the line 00 a: of Fig. 1.

Similar letters of reference indicate corresponding parts.

The handle A, which carries the fixed jaw a,is preferably formed of a single piece or bar of steel, and the. frontedge of the handle is serrated a portion of its length, as shown at b, or the serrations may extend the entirelength of the handle, if desired. The movable or sliding jaw B is also preferably of steel, and the face b thereof is formed with serrations to correspond with the serrations of the handle A. The side of the movablejaw opposite the serrations is cut away, as shown, to form a seat for the broad band or yoke O,which surrounds the movable jaw and the handle.

In the recess 0, which is formed in the upper side of the yoke O, is pivoted the lever D, which is provided at its forward end with the teeth or cogs d, which engage with the teeth or cogs e, formed on the end of the wedge E, 0

which moves in a wedge shaped chamber formed between the handleA and the yoke O, and serves, when the lever is in the position shown in Fig. 1, to firmly lock the serrated edges of the movable jaw and the handle together, thus holding the movablejaw in place for turning the nut. The lever is normallyheld in the position shown in Fig.1 by the spring F, which is riveted at one end to thelever, the other end thereofimpingingupon the uppersideofthe yoke G. In order to set the movable jaw the lever D must be raised, which will withdraw the wedge E, and disengage the serrated edges of the movablejaw and the handle, permitting the jaw and the yoketo be readily moved in position to fit any sized nut, in which position it will be locked by simply permitting the lever to drop 'toplace.

It will be observed that bythis construction the broad serrated surface of the movable jaw and the yoke re-enforce the handle at the point where in use the greatest strain comes, and thus stiffen the handle at that point and hold it from springing, and thus prevent all danger of the edges of the nut turning between the jaws.

Having thus described my invention, what I claim as new, and desire to secure by Letters I Patent, is

The serrated handle A, serrated movable jaw B, and yoke (l, in combination with the toothed lever D and wedge E and the leverspring F, substantially as and for the purposes specified.

GEORGE THEODORE FINAGIN.

Witnesses:

WILFORD CUBBAGE, BEN. F. THOMAS. 

